Apparatus for die cutting and scoring paper sheets



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APPARATUS FOR DIE CUTTING AND. SCORING PAPER SHEETS 7 Filed May 31, 1967 v Sheet. of 1s INVENTOR C.F.DESLAUR|ERS ATTORNEY C. F. DESL'AURIERS APPARATUS FOR DIE CUTTING AND 300mm PAPER SHEETS Sheet 42 o2 b L l .TrJTI m 4 R Y Ir .L. .1 R E nsfm i Eff wz m 1 K J 5 n .a T IL-IQI I Z. lmwfl: m w r w: 2 6: MD M u. w m a. a 1) n m a mw t v u. I l 1| I- .F. .U .n W W. m un m i m n "u I 1 mm n f PTIFIIIIIT: 1| J.\r C. v i1 v n 1 v 2 mb n wt ON U m: om? a q whm 0 Q $7 May 13, 1969 Filed May 31, 19 67 mm 4 5 om Z mm mm May 13, 1969 c. F.- DESLAU'RIERS 3,443,488 APPARATUS FOR DIE CUTTING AND scoamo PAPER'SHEETS Filed May 31. 1967 Sheet I /3 United States Patent 3,443,488 APPARATUS FOR DIE CUTTING AND SCORING PAPER SHEETS Clovis F. Deslauriers, Harbor Drive, Port Chester, N.Y. 10573 Filed May 31, 1967, Ser. No. 642,460

Int. Cl. B31b 1/14 U.S. CI. 93-58 11 Claims ABSTRACT OF THE DISCLOSURE A rotating cam disc synchronously reciprocates a die bed and lifts a pressure roller toward the cylinder when the die bed is moved from the feeding end to the discharge end of the apparatus. The cylinder and pressure roller are rotated by the shaft of the cam disc in synchronism with the rotation of a second cam disc associated with the cylinder and said second cam disc actuating a bellcrank adapted to move the cylinder away from the pressure roller which is permitted to be yieldingly supported during the travel of the die bed from the discharge end to the feeding end of the apparatus.

This invention comprises apparatus for automatically die cutting and scoring sheets of corrugated paperboard or the like for various purposes, such as boxes, and particularly to adjustable stacking members for stock sheets, reciprocating fingers for feeding the bottom sheet from the stack to a pair of feeding rollers to position said sheet on a die on a reciprocating bed which subsequently travels over a rotating pressure roller for urging the sheet on the die against a rotating cylinder, and said cylinder forcing the sheet against the die and causing the die to cut and score said sheet. Subsequently the cut and scored sheet is presented by the die bed to suction means which removes the cut and scored sheet from the die. After the cut and scored sheet is removed from the die, the die bed is returned to the feeding end of the apparatus to receive the succeeding lowermost sheet in the stack. The suction is shut-off from the sheet removing means to release the cut and scored sheet onto a conveyor which removes said to a depository. During the retrograde movement of the die bed, the cylinder is elevated by a cam disc operated bell-crank which is also actuated by said cam disc to hold the cylinder in pressure applying position during the feeding movement of the die bed. Also the pressure roller is released from its pressure applying poistion during the retrograde movement of the die bed.

In the drawing accompanying and forming a part of this application:

FIGURE 1 is a side elevational view of the discharge end of the die cutting apparatus showing a die bed positioned relative to the suction means;

FIGURE 2 is a side elevational view of the feeding end portion of the apparatus showing the adjustment of rear sheet stacking members;

FIGURE 3 is a rear elevational view of an electric motor constituting the main source of power;

FIGURE 4 is a side elevational view of the feeding rollers for transferring a sheet from the feeding fingers at the feeding end portion onto the die on the reciprocating bed;

FIGURE 5 is a cross-sectional view taken on the zigzag line 55 of FIGURE 1 looking in the direction of the arrows to show the drive of the cylinder and the pressure roller;

FIGURE 6 is a plan view of the part of the apparatus shown in FIGURE 1 to show the relationship of the cam disc for reciprocating the die bed and the cylinder;

FIGURE 7 is a side elevational view, on an enlarged scale, of the cylinder and the cam disc operated bellcrank for locking the cylinder in die engaging position and elevating said cylinder during the retrograde movement of the die bed;

FIGURE 8 is a side elevational view, on an enlarged scale, of the feeding end portion of the apparatus showing the feeding fingers relative to a stack of sheets;

FIGURE 9 is a transverse view taken on the line 99 of FIGURE 8 looking in the direction of the arrows and showing the adjustable mounting of the rear sheet stacking members;

FIGURE 10 is a transverse view taken on the line 1010 of FIGURE 8 looking in the direction of the arrows and showing the cam discs for reciprocating the feeding fingers and the means for adjusting the sheet stacking members;

FIGURE 11 is a plan view looking at the top of FIGURE 10;

FIGURE 12 is a sectional view of one longitudinal half of the apparatus, on an enlarged scale, taken on the line 1212 of FIGURE 1 looking in the direction of the arrows to show the suction means for removing a cut and scored sheet from the die to a discharge conveyor;

FIGURE 13 is a plan view similar to FIGURE 6 showing the position of the actuating mechanism of the die bed when said die bed is in the full lined position shown in FIGURE 14;

FIGURE 14 is an elevational view of an intermediate portion of the apparatus with the die bed reciprocated to the sheet receiving position;

FIGURE 15 is a view showing the manner of rotating the feeding rollers, the cylinder and the pressure roller from the same source of power;

FIGURE 16 is a perspective view of an adjustable sheet stacking member;

FIGURE 17 is a perspective view of an end portion of the mounting of the feeding fingers;

FIGURE 18 is a fragmentary plan view showing a modified drive for rotating the cylinder and the cam disc for actuating the bell-crank lever;

FIGURE 19 is a transverse view similar to FIGURE 9 showing a modified manner of connecting the cam discs to the feeding fingers;

FIGURE 20 is a view looking at the top of FIGURE 19;

FIGURE 21 is an enlarged view of the modified connection between the feeding fingers and the cam discs shown in FIGURE 19;

FIGURE 22 is a sectional view taken on the line 22- 22 of FIGURE 7 looking in the direction of the arrows and showing the adjustable mountings of the sheet stacking members; and

FIGURE 23 is a sectional view taken on the line 2323 of FIGURE 22 looking in the direction of the arrows to show the vertical adjustment mounting of the front edge stacking members.

The embodiment of the invention is supported by a frame 19 having at the upper side portions a pair of opposed rails 20 for the engagement of wheels 21 having V-shaped grooves to engage V-shaped edges of the rails. Said wheels 21 are rotatably mounted on a bed or platen 22 to provide reciprocal movement of the bed longitudinally of the frame 19. Said bed 22 is adapted to support a die 23 and move said die below a cylinder 24 having spindles 24 rotatably supported in bearing brackets 25, each bracket being pivoted on a shaft 26 rotatable in a standard 27 extended vertically from the top of each side member of the frame 19 above the rails 20, as shown in FIGURES 1, 5, 6 and 7. A spring 28 is compressed between the bracket 25 and the top of the side members of the frame 19, as shown in FIGURES 5 and 6, to yieldingly support the cylinder 24.

At the feeding end of the reciprocal movement of the die bed 22, the lowermost sheet s of stock corrugated paperboard or the like is deposited on the die 23 from a stack of said sheets or corrugated paperboard supported on top of the frame 19 with the rear ends of the sheets slightly raised by a plurality of stacking members 29 adjustably mounted on a transverse rod 30 having the opposite ends screw-threaded on a pair of screw-threaded adjustment members 31, each member 31 having its opposite ends rotatably supported in brackets 32 secured to the top side members of the frame 19, as shown in FIGURES 2, 4, 8, 9 and 16. The adjustment members 31 are adjusted by a hand wheel 33 secured on an intermediate portion of a shaft 34 rotatably mounted in brackets 35 supported by the top side members of the frame 19 with the ends of the shaft 34 extended beyond said brackets 35 and connected to the screw-threaded members 31 by miter-gearing 36, as shown in FIGURES and 11. The rotation of the hand wheel 33 will adjust the supporting stacking members 29 to support sheets of different lengths and the adjustment of the stacking members on the rod 30 will accommodate sheets of different widths.

The lowermost sheet s is removed from the stack by a plurality of resilient fingers 37 mounted on a bar 38 pivotally supported at the opposite ends in roller bearings 39 secured on a horizontal slide 40 sliding in recesses 41 in the top side members of the frame 19, as shown in FIGURES 8, 9 and 17. Reciprocation is imparted to the slide 40 by cam grooved discs 42 secured on a shaft 43 rotatably mounted at the opposite ends in bearings 44 suspended from the top side members of the frame 19. A bell-crank 45 is pivoted on a bracket 46 suspended from each side member of the frame 19 and one arm of said bell-crank 45 is provided with a roller riding in the cam groove of the discs 42, as shown at 47 in FIGURES 8, 10 and 11. The other arm of the bell-crank 45 is connected to the slide 40 by links 48, as shown in FIGURES 8 and 9.

Rotation is imparted to the shaft 43 by an electric motor 49 mounted on lower longitudinal members 50 of the frame 19. Said motor 49 is provided with two shafts 51 and 52 driven in opposite directions and at different speeds, shaft 51 being rotated in a clockwise direction and at a low speed and the shaft 52 being rotated in a counterclockwise direction and at a high speed, as shown in FIGURES 2, 3 and 15. Shaft 51 is provided with a sprocket wheel 53 of larger diameter than a sprocket wheel 54 secured on the shaft 52. Sprocket wheel 53 is connected by a sprocket chain 55 to a sprocket wheel 56 secured on a shaft 57 rotatably supported by bearings 58 mounted on a frame member 50 and transverse frame members 59, as shown in FIGURES 2, 6 and 14. A sprocket wheel 60 is secured on the end of the shaft 57 extended laterally from the lower side member 50 of the frame 19 and a sprocket chain 61 is engaged on said sprocket wheel 60 and a sprocket wheel 62 secured on the end of the shaft 43 of the cam grooved discs 42, as shown in FIGURES 2, 6, 8 and 10.

FIGURES 19, 20 and 21 show a modified connection between the bar 38 carrying the fingers 37 and the cam discs 42 wherein the slide 40 is replaced by a pair of slides 178 slidable in slide-ways 179 arranged in a platform 180 supported at the sides by the top members of the frame 19. The slides 17 8 are extended below the platform 180 and connected by a rod 181 pivotally connected to the links 48. The brackets 32 and the bearings 39 are mounted on the platform 180.

The fingers 37 feed the lowermost sheet s to feeding rollers 63 and 64 supported by standards 65 slidably supported on a slide-way 66 on the top members of the frame 19. The rollers 63 and 64 are adjusted longitudinally of the frame 19 by a hand wheel 67 rotatably supported in a bracket 68 of the frame 19 and actuating a miter-gear 69 meshing with a miter-gear 70 secured on a shaft 71 rotatably mounted in said bracket 68 and having a screwthreaded connection with a fixture 72 of the standards 65, as shown in FIGURES 4 and 7. The bite of the rollers 63 and 64 is adjusted by mounting the roller 63 on one end of an arm 73 pivoted at the other end on a shaft 74 rotatably supported by the standards 65, as shown in FIGURE 4. The end of the arm 73 supporting the roller 63 is provided with a socket 75 for the adjustable engagement of an adjustment screw 76 rotatably mounted in a lateral arm 77 of the standards 65 and said screw 76 is arranged with a miter-gear 78 meshing with a miter-gear 79 also supported on a horidontal axis by the arm 77 and actuated by a hand wheel 80, as shown in FIGURES 4 and 7.

The roller 63 is rotated in a clockwise direction and the roller 64 is rotated in a counterclockwise direction to feed the sheet s to the discharge end of the apparatus and onto the die on the bed 22. This is accomplished by a sprocket chain 81 engaged on the sprocket wheel 54 and on a sprocket wheel 82 secured on the shaft 74. A sprocket chain 83 is engaged on a sprocket wheel 82 secured on the shaft 74 and on a sprocket wheel 84 secured on the shaft of the roller 64. The shaft 74 is also provided with a gear 85 meshing with a gear 88 secured on the shaft of the roller 63.

The sides at the front ends of the sheets s of stock corrugated paperboard or the like are engaged by stacking members 87 slidable on a shaft 88 secured at the opposite ends in the standards 65 and the stacking members 87 are secured in adjusted position depending on the width of the sheets by a set-screw 90, as shown in FIG- URES 7 and 22. The front edges of the sheets s above the lowermost sheet abut stacking members 168 having channel members 169 slidably mounted on brackets 170 having a tubular portion 171 at the lower end slidably mounted on a transverse member 172 secured at the opposite ends on the standards 65, as shown in FIGURES 7, 22 and 23. The space below the members 168 is varied to accommodate sheets s of different thickness by an ad justment screw 173 rotatably mounted in a flange 174 of each member 168 and screw-threaded in a flange 175 of each bracket 170 and the adjustment screw 173 is retained in adjusted position by a nut 176. The brackets 170 are retained in adjusted position on the transverse member 172 by set-screws 177. The lowermost sheet s is fed by the fingers below the members 168 to the feeding rollers 63 and 64.

The rollers 63 and 64 will deposit the bottom sheet s on the die 23 during the travel of the bed 22 toward the discharge end portion of the apparatus and between the cylinder 24 and a pressure roller having spindles 101 rotatably mounted in vertical alignment with spindles 24 and in bearings 102 slidably mounted in fixtures 103 supported by frameworks 104 mounted on transverse members 105 of the frame 19. The roller 100 is balanced in the fixtures 103 by springs 106 compressed between ears 107 extended from the bearings 102 and ears 108 extended from the fixtures 103, as shown in FIGURES 1, 5, 13 and 14.

The die bed 22 is reciprocated on the rails 20 by a disc 109 secured on the inner end portion of the shaft 57 and having a cam groove 110 engaged by a roller 111 on one arm of a bell-crank 112 pivotally supported on a standard 113 mounted on the transverse members 59 of the frame 19. The other arm of the bell-crank 1412 is pivotally connected to a link 114 rotatably connected to an intermediate portion of a rod 115 and retained against longitudinal movement on said rod 115 by collars 116. The opposite ends of the rod 115 are extended beyond the sides of the frame 104 and pivotally connected to intermediate portions of levers -117 having one end pivotally connected to the axis of a pair of opposed wheels 21, as shown at 118 in FIGURES l, 5, 6 and 14, and the opposite ends of said levers 117 are pivotally anchored to the frame 19 by links 119.

The cylinder 24 is rotated in a clockwise direction from the shaft 57 by a sprocket chain 120 operatively connected to said shaft 57 outside the frame 119 and to the shaft 26. A sprocket chain 121 operatively connects a spindle 24' and shaft 26.

The cylinder 24 is lifted from the path of travel of the die bed 22 during the retrograde travel of the said die bed 22 from the discharge end to the feeding end of the apparatus. This is accomplished by a bell-crank 122 secured on a shaft 123 rotatably mounted in a bracket 124 secured to the upper longitudinal members of the frame 19. One arm of the bell-crank 122 is provided with a roller 125 to abut the under-surface of an extension 126 of the brackets 25 and raise the cylinder 24, as shown in FIGURE 7, and the other arm of the bell-crank is arranged with a lateral projection or hook 127 to engage the upper-face of said extension 126 and retain the cylinder in its sheet pressing position. The bell-crank 122 is actuated by a disc 128 rotatably mounted on a stud shaft 129 extended laterally from a depending ear 130 of the brackets 25. Said disc 128 is arranged with a cam groove 131 for the engagement of a roller 132 on an arm 133 secured to the shaft 123.

The cylinder 24 and the cam disc 128 are rotated in unison by a gear 134 secured to the spindles 24 and meshing with a gear 135 secured on the stud shafts 129. The sheet cutting and scoring position of the cylinder 24 is determined by an abutment screw 136 adjustable in the base of the standard 27 to abut the depending ear 130, as shown in FIGURES 1 and 7.

The pressure roller 100 is rotated in a counter-clockwise direction from the shaft 57 by a sprocket chain 137 engaging a sprocket wheel 138 secured on the shaft 57 and a sprocket wheel 139 secured on a stud shaft 140 rotatably mounted in one of the fixtures 103. A gear 141 is secured on the stud shaft 140 in meshing engagement with a gear 142 secured on one of the spindles 101, as shown in FIGURES 1, 5, 6, 13, 14 and 15.

The pressure roller 100 is lifted toward the cylinder 24 when the die bed 22 is actuated from the feeding end to the discharge end of the apparatus by the rotation of the cam grooved disc 109 reciprocating wedges 143 slidably supported on top of the frameworks 104 and having each thick end pivotally connected to one end of a lever 144 pivoted on each framework 104 and having the opposite end secured to each end of a rod 145. The intermediate portion of the rod 145 is slidably engaged in a slot 146 in an end portion of a link 1147 having a pin 148 extended laterally from the opposite end and slidably mounted in a slot 149 in the arm of the bell-crank 112 connected to the link 114.

FIGURE 18 shows a modified manner of connecting the shaft 57 to one of the spindles 24 of the cylinder 24. The sprocket chain 121 and its sprocket wheels are mounted on the outside of the frame 19, as indicated at 150.

When the die bed 22 is positioned on the discharge end of the apparatus with the cut and scored sheet, said cut and scored sheet is positioned below suction removing means comprising a framework 151 pivotally mounted on 2. lateral exteension 152 of an upper rail 20 and having longitudinal members 153 adjustably supporting a plurality of cups 154 above the path of travel of the die bed 22 when the framework 151 is adjusted to a horizontal position, as shown in FIGURES 1 and 12. The cups 154 are connected to a suction pump, not shown, by a pipe 155 supported in a bracket 156 mounted on a top portion of the framework 151 and said pipe 155 is connected to the cups 154 by tubing 157. When the cut and scored sheet is held against the cups by the suction, the framework 151 may be pivoted from its horizontal position to a canted position, as shown in broken lines in FIGURE 12, to permit the die bed 22 to return to the feeding end of the apparatus. After the die bed 22 is moved from the framework 151, the framework 151 is returned to its horizontal position and the suction is shut off to permit the cut and scored sheet to drop onto a conveyor comprising an endless belt 158 extended around pulleys 159 and 1160, pulley 159 being secured on a shaft 161 having its ends rotatably mounted in bearings 162 supported by the frame 19. The pulley 160 is rotatably supported by standards 163 mounted on the frameworks 104, as shown in FIGURE 1. The conveyor belt 158 is actuated to have the upper stretch travel toward the pulley 159 by an electric motor 164 mounted on a transverse member 165 supported by vertical standards of the frame 19 and connected by belts 166 to the shaft 161. The conveyor belt 158 will remove the cut and scored sheet from the apparatus to a depository, not shown, located at the discharge end of the apparatus.

In operation, a supply of sheets of stock corrugated paperboard or the like is deposited within the stacking members 29, 87 and 168, and the electric motor 49 is connected to a source of electricity. The rotations of the cam grooved discs 42 and 109 are synchronized so that the fingers 37 are actuated toward the members 168 simultaneously with the actuation of the die bed 22 toward said members 168. The fingers 37 will engage and move the lowermost sheet s under the members 168 into the bite of the feeding rollers 63 and 64. The feeding rollers 63 and 64 will position the sheet s on the die 23 and the die bed 22 will progressively move the sheet s under the cylinder 24 which is held in its lowermost position by the bellcrank hook 127 while the pressure roller is held against downward movement by the wedges 143. After the sheet s is completely cut and scored by the die 23, it is presented by the die bed 22 to the suction cups 154 to be removed from the die 23. The cut and scored sheet is held against the cups 154 by suction while the die bed 22 is returned to the feeding end of the apparatus. During the retrograde movement of thedie bed 22, the cylinder 24 is lifted by the bell-crank roller and the wedges 143 are actuated to permit the pressure roller 100 to move in a downward direction under the yielding force of the springs 106. The framework 151 can remain in its horizontal position during the retrograde movement of the die bed 22 depending on the thickness of the cut and scored sheet. When the die bed 22 is completely clear of the framework 151, the suction is shut off and the cut and scored sheet drops by gravity onto the conveyor belt 158 to be removed to a suitable depository.

What I claim as my invention is:

1. In apparatus for die cutting and scoring paper sheets, a horizontal rotary cylinder, a pressure roller rotatably mounted and parallelly spaced below the cylinder, a die bed reciprocally mounted to travel transversely of and between the cylinder and the pressure roller, means to support a stack of stock paper sheet adjacent to one terminus of the reciprocal movement of the die bed, a pair of feeding rollers rotatably mounted in vertical alignment to each other between the paper stack supporting means and the cylinder, spaced fingers reciprocally mounted to travel in a horizontal plane and transfer the lowermost sheet from the stack to the pair of feeding rollers, said feeding rollers delivering said sheet onto the die bed, and motive means operatively connected to the cylinder, the pressure rollers, the die bed, and the pair of feeding rollers and the spaced fingers and said motive means adapted to rotate the cylinder and the pressure roller and reciprocate the die bed and the spaced fingers at low speed and rotate the feeding rollers at high speed.

2. In apparatus for die cutting and scoring paper sheets as claimed in claim 1, means to pivotally support the cylinder on an axis radially spaced from the axis of rotation of said cylinder and provide vertical adjustment of the cylinder toward and away from the path of travel of the die bed.

3. In apparatus for die cutting and scoring paper sheets as claimed in claim 2, means for vertically adjusting the cylinder actuated by the motive means.

4. Apparatus for die cutting and scoring paper sheets as claimed in claim 3, wherein the means for vertically adjusting the cylinder comprises a bell-crank pivotally mounted at each end of the cylinder, each bell-crank having a first arm arranged to engage the cylinder supporting means and retain the cylinder in die cutting and scoring position and a second arm of the bell-crank adapted to engage the cylinder supporting means and vertically adjust said cylinder, a cam disc rotatably mounted on the cylinder supporting means, and a cam-follower connected to each bell-crank and operatively engaging the cam disc.

5. Apparatus for die cutting and scoring paper sheets as claimed in claim 2, wherein the means to pivotally support the cylinder comprises two brackets pivotally mounted parallelly of each other at the opposite ends of the cylinder.

6. In apparatus for die cutting and scoring paper sheets as claimed in claim 5, wherein each bracket of the cylinder supporting means is provided with an extension, a bell-crank pivotally mounted adjacent each end of the cylinder, each bell-crank having a first arm arranged with a hook to engage the upper-face of each extension and retain the cylinder in die cutting and scoring position and the second arm of each bell-crank adapted to engage the under-face of each extension and vertically adjust the cylinder during the retrograde travel of the die bed, a cam disc rotatably mounted on the cylinder supporting means and rotated by the motive means, and a cam-follower connected to each bell-crank and operatively engaging the cam disc.

7. In apparatus for die cutting and scoring paper sheets as claimed in claim 1, a cam disc rotatably mounted to extend in a vertical plane intermediate the ends of the cylinder and operatively connected to the motive means, a bell-crank pivotally mounted adjacent to said cam disc and having a first arm provided with a cam-follower peratively engaging said cam disc, a pair of levers pivotally mounted at one end and the opposite ends of said levers pivotally connected to the sides of the die bed, and means connecting intermediate portions of the levers to a second arm of the bell-crank, whereby rotation of said cam disc reciprocates the die bed.

8. In apparatus for die cutting and scoring paper sheets as claimed in claim 7, means to slidably and yieldingly support the pressure roller, and means operated by the cam disc reciprocating the die bed and arranged to retain the pressure roller against yielding movement during the die cutting and scoring operation.

9. In apparatus for die cutting and scoring paper sheets as claimed in claim 1, means to slidably and yieldingly support the pressure roller, and means operated by the power means and arranged to retain the pressure roller against yielding movement during the die cutting and scoring operation.

10. In apparatus for die cutting and scoring paper sheets as claimed in claim 1, a cam disc rotatably mounted substantially in the path of travel of the die bed and rotated by the motive means, a bell-crank actuated by cam disc and operatively connected to the spaced fingers whereby said fingers are reciprocated to transfer the lower-most sheet from the stack to the pair of feeding rollers.

11. In apparatus for die cutting and scoring paper sheets as claimed in claim 1, a conveyor traveling in a horizontal plane below the path of travel of the die bed and in the section of said path of travel of the die bed where the die bed is carrying a cut and scored paper sheet, and suction means adjustably mounted to be positioned in a horizontal plane above the path of travel of the die bed and said suction means adapted to remove a cut and scored paper sheet from the die bed and deliver said cut and scored sheet to the conveyor when the die bed has been reciprocated from said suction means.

References Cited UNITED STATES PATENTS 2,168,401 8/1939 Evers 83-284 2,751,003 6/1956 Mueller 83-284 2,776,610 l/ 1957 Roselius 83-510 X 3,237,499 3/1966 Lohrand et al. 83510 3,301,110 1/19617 Stegner.

ANDREW R. JUHASZ, Primary Examiner.

FRANK T. YOST, Assistant Examiner.

U.S. Cl. X.R. 

